EP2483091B1 - Air conditioning system for automotive vehicles and method of operating such an air conditiong system in various modes - Google Patents

Air conditioning system for automotive vehicles and method of operating such an air conditiong system in various modes Download PDF

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Publication number
EP2483091B1
EP2483091B1 EP10770742.4A EP10770742A EP2483091B1 EP 2483091 B1 EP2483091 B1 EP 2483091B1 EP 10770742 A EP10770742 A EP 10770742A EP 2483091 B1 EP2483091 B1 EP 2483091B1
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EP
European Patent Office
Prior art keywords
duct
air conditioning
refrigerant
heat exchanger
air
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EP10770742.4A
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German (de)
French (fr)
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EP2483091A1 (en
Inventor
Jean-Luc Thuez
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Valeo Systemes Thermiques SAS
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Valeo Systemes Thermiques SAS
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
    • B60H1/00385—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell
    • B60H1/00392—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell for electric vehicles having only electric drive means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
    • B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
    • B60H1/00899—Controlling the flow of liquid in a heat pump system
    • B60H1/00907—Controlling the flow of liquid in a heat pump system where the flow direction of the refrigerant changes and an evaporator becomes condenser
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H1/3204—Cooling devices using compression
    • B60H1/3228—Cooling devices using compression characterised by refrigerant circuit configurations
    • B60H1/32281—Cooling devices using compression characterised by refrigerant circuit configurations comprising a single secondary circuit, e.g. at evaporator or condenser side
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
    • B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
    • B60H2001/00928—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices comprising a secondary circuit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
    • B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
    • B60H2001/00935—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices comprising four way valves for controlling the fluid direction

Definitions

  • the invention is in the field of ventilation, heating and / or air conditioning of an electric or hybrid motor vehicle. It relates to an air conditioning system cooperating with such an installation. It also relates to a method of implementing such a system according to various modes of operation.
  • An electric or hybrid motor vehicle whose propulsion is provided at least partially by an electric motor, is commonly equipped with a ventilation, heating and / or air conditioning system to modify the aerothermal parameters of the air contained in the inside the vehicle interior. Such a modification is obtained from the delivery of an air flow inside the passenger compartment.
  • the air conditioning system comprises a ventilation, heating and / or air conditioning installation consisting mainly of a housing made of plastic and housed under a dashboard of the vehicle.
  • the housing channels the flow of air flow prior to the delivery of the latter inside the passenger compartment.
  • the housing is provided with at least one defrosting / demisting port for delivering the airflow to a windshield and / or front windows of the vehicle with a view to de-icing and / or demisting.
  • the air conditioning system also comprises an air conditioning loop inside which circulates a refrigerant and a secondary loop inside which circulates a heat transfer fluid.
  • a first exchanger of heat coolant / heat transfer fluid is constitutive of both the air conditioning loop and the secondary loop so that the coolant and heat transfer fluid can exchange heat with each other.
  • the air-conditioning loop comprises a compressor for compressing the cooling fluid, a four-way valve, the first refrigerant / heat transfer fluid heat exchanger to allow the cooling fluid to cool to a relatively constant pressure by yielding heat to the coolant, at least one expansion element to allow expansion of the cooling fluid, a second refrigerant / ambient air heat exchanger to allow heat exchange between the refrigerant and ambient air, such as the air outside the vehicle.
  • the air conditioning loop also includes a heat exchanger disposed inside the housing for the refrigerant to exchange heat with the air flow therethrough and a refrigerant accumulator to prevent refrigerant admission to the refrigerant. liquid state inside the compressor.
  • the secondary loop comprises a pump for circulating the coolant, the first coolant heat exchanger / heat transfer fluid to allow the heat transfer fluid to recover heat from the refrigerant and a radiator housed inside the installation for the heat transfer fluid to give heat to the air flow.
  • the radiator is provided with shutters to allow or prohibit a passage of the air flow through the radiator.
  • Such an air conditioning system is arranged to allow defrosting of the second refrigerant / ambient air heat exchanger.
  • a problem posed by the use of the air conditioning system described by US 2002/0036080 resides in the fact that the air conditioning system is not suitable to operate effectively in heating mode and air conditioning mode in which it is respectively desired to heat and cool the air flow prior to its delivery to the interior of the passenger compartment. More particularly, such a system is not able to operate effectively alternately in heating mode and in cooling mode. More specifically, such a system does not deliver the air flow without generating a fogging of the windshield and / or the front windows of the vehicle, for example when going from an operating mode of the air conditioning system to a other mode.
  • WO 03/051657 A1 discloses an air conditioning system according to the preamble of claim 1.
  • the purpose of the present invention is to provide an air conditioning system for equipping an electric or hybrid motor vehicle, such a system offering various modes of operation, including at least one heating mode and an air conditioning mode, such an air conditioning system being moreover arranged to allow a transition from one mode of operation to another mode without risk of fogging a windshield and / or front windows of the vehicle.
  • Another object of the present invention is to provide a method of implementing such an air conditioning system that allows a heating of an air flow as efficiently as possible.
  • An air-conditioning system of the present invention is an air-conditioning system for a motor vehicle according to claim 1.
  • the first, second, third and fourth channels are refrigerant flow paths within the four-way valve.
  • the first heat exchanger fluid coolant - heat transfer fluid, the first expansion member and the second refrigerant fluid heat exchanger / ambient air are directly in series on the air conditioning loop, that is to say without other intermediate component outside pipes connecting them.
  • the inlet of the first bypass device is thus connected between the first heat exchanger / coolant heat exchanger and the first expansion member while the output of the first bypass device is connected between this body and the second refrigerant fluid heat exchanger / ambiant air.
  • the first detent member is associated with a first bypass device.
  • a second bypass device is arranged in parallel with the second expansion member and the heat exchanger, in parallel with these two components.
  • the input of the second bypass device is therefore immediately upstream of the second expansion element and the output of the second bypass device is directly downstream of the outlet of the heat exchanger placed inside the installation (according to the direction of circulation of the refrigerant on the figure 2 ).
  • the compressor is advantageously arranged on the air conditioning loop between a refrigerant fluid outlet FR that comprises the four-way valve and a refrigerant fluid inlet FR that also comprises the four-way valve.
  • the compressor is preferably associated with an accumulator which is arranged on the air conditioning loop between the compressor and the refrigerant outlet FR .
  • the secondary loop preferably comprises a pump and a heat transfer fluid / electrical auxiliary exchanger.
  • the electrical auxiliary is for example an electric motor and / or an electronic power unit and / or a battery.
  • the radiator is advantageously equipped with at least one mixing flap of a flow of air circulating inside said installation.
  • Said system advantageously comprises means for controlling the implementation of the first channel, the second channel, the third channel, the fourth channel, the first bypass device, the second bypass device, the pump and the mixing flap.
  • control means is preferably placed under the control of information relating to a difference D between a measurement of a temperature Ta of ambient air A and a first threshold temperature Ts1.
  • the first heating mode consists in opening the first channel and the second channel, closing the third channel and the fourth channel, opening the first bypass device, closing the second bypass device, putting the mixing flap in a position of close and stop the pump.
  • the second heating mode consists of closing the first channel and the second channel, opening the third channel and the fourth channel, closing the first bypass device, opening the second bypass device, putting the mixing flap in a position of closing and start the pump.
  • the method comprises a first dehumidification mode which consists in closing the first channel and the second channel, opening the third channel and the fourth channel, opening the first bypass device, closing the second bypass device, setting the mixing flap in the open position and put the pump into operation.
  • the method comprises a second dehumidification mode which consists of closing the first channel and the second channel, opening the third channel and the fourth channel, closing the first bypass device, closing the second bypass device, setting the mixing flap in the open position and put the pump into operation.
  • the method comprises an air conditioning mode which consists of closing the first channel and the second channel, opening the third channel and the fourth channel, opening the first bypass device, closing the second bypass device, putting the mixing flap into operation. closing position and stop the pump.
  • the method comprises a time period T during which the implementation of the air conditioning system according to the first heating mode is prohibited and during which the implementation of the Air conditioning system according to the second heating mode is allowed.
  • a motor vehicle is equipped with an air conditioning system 1 for modifying the aerothermal parameters of the air contained inside the passenger compartment of the vehicle.
  • the air conditioning system 1 comprises a ventilation system, heating and / or air conditioning 3 mainly consisting of a housing made of plastic material.
  • the installation 3 is housed under a dashboard of the vehicle and channels the circulation of the air flow 2.
  • the installation 3 houses a blower 4 to circulate the air flow 2 from at least one intake port d air 5 to at least one air delivery mouth 6 that includes the housing.
  • the air delivery port 6 is in particular a defrosting / defogging mouth which is intended to deliver the flow of air 2 to the windshield and / or the front windows of the vehicle.
  • the air conditioning system 1 comprises an air conditioning loop 7 inside which circulates a refrigerant fluid FR , such as carbon dioxide known under the name R744.
  • the air conditioning loop 7 comprises a compressor 8 for compressing the refrigerating fluid FR in the gaseous state, and optionally an accumulator 9 for preventing an intake of refrigerant fluid FR in the liquid state inside the compressor 8.
  • the accumulator 9 is disposed on the air conditioning loop 7 upstream of the compressor 8 in a direction of circulation 10 of the refrigerant FR inside the compressor 8 and the accumulator 9.
  • the air conditioning loop 7 also comprises a heat exchanger 11 which is housed inside the installation 3.
  • the heat exchanger 11 is intended to change the temperature of the air flow 2 which circulates inside the installation 3 and which passes through the heat exchanger 11.
  • the air conditioning circuit 7 also comprises a first fluid heat exchanger refrigerant / heat transfer fluid 12 to enable the refrigerant fluid FR exchanging heat with a coolant circulating Fc within a secondary loop 13.
  • Loop air conditioning 7 finally includes a four-way valve 19 to configure the air conditioning loop 7 in heating mode or air conditioning mode.
  • heating mode the heat exchanger 11 behaves like a condenser and tends to heat the flow of air 2 which passes through it.
  • air conditioning mode the heat exchanger 11 behaves like an evaporator and tends to cool the flow of air 2 which passes through it.
  • the air conditioning system 1 also comprises the secondary loop 13 inside which circulates the coolant FC , such as a mixture of water and glycol.
  • the secondary loop 13 comprises the first heat exchanger / coolant heat exchanger 12, a pump 28 and a radiator 29.
  • the latter is housed inside said installation 3 downstream of the heat exchanger 11 in a direction of flow of the air stream 2 inside the installation 3.
  • a day of use of the vehicle and at a temperature Ta of an ambient air A such as the air outside the vehicle, it is common to have to use the air conditioning system 1 first mode heating, then in cooling mode and finally again in heating mode.
  • a first threshold temperature Ts1 for example of the order of 5 ° C
  • Ts2 for example of the order of 20 ° C
  • the ambient air temperature A increasing to exceed a second threshold temperature Ts2 , for example of the order of 20 ° C, it is desirable to operate the air conditioning system 1 in air conditioning mode.
  • the ambient air temperature A decreasing, until becoming lower than the first threshold temperature Ts1 it is desirable to operate the air conditioning system 1 again in heating mode.
  • the heat exchanger 11 In cooling mode, the heat exchanger 11 behaving like an evaporator, a water vapor carried by the air stream 2 tends to condense on an external surface S of the heat exchanger 11.
  • the heat exchanger 11 When switching to heating mode, the heat exchanger 11 then behaving like a condenser, the condensed water on the outer surface S of the heat exchanger 11 vaporizes and tends to condense on the windshield and / or the front windows of the vehicle.
  • the present invention overcomes this drawback of an air conditioning system of the prior art by proposing an air conditioning system 1 arranged so as to heat the air flow 2 through the heat exchanger 11 and / or through the radiator 29, then to cool the air flow 2 through the heat exchanger 11, then to heat the air flow 2 via the radiator 29, and then to heat the flow by way of the heat exchanger 11.
  • the present invention proposes to preferentially use for a period of time T , a heating of the flow of air 2 through the radiator 29, to allow the heat exchanger 11 to dry out, that is to say, to slowly transfer the condensed water on its outer surface S to the air stream 2, then the lapse of time T having elapsed, the present invention proposes heat the air flow 2 through the heat exchanger 11, the outer surface S has become free of condensed water.
  • the air conditioning circuit 7 of the air conditioning system 1 comprises a second refrigerant / ambient air heat exchanger 14 to allow a heat exchange between the refrigerating fluid FR and the ambient air A.
  • the second refrigerant / ambient air heat exchanger 14 is placed at the front of the vehicle to facilitate such a heat exchange.
  • the air conditioning loop 7 also comprises two expansion members 15,16 each associated with a bypass device, or bypass valve, respectively 17,18.
  • the bypass devices 17 and 18 are intended to allow or prohibit a circulation of the refrigerant fluid FR inside the expansion members 15,16 to which they are respectively affected.
  • a first detent 15, associated with a first bypass device 17, is interposed between the first heat exchanger fluid coolant / heat transfer fluid 12 and the second heat exchanger refrigerant fluid / ambient air 14.
  • a second expansion member 16 is interposed between the second heat exchanger refrigerant / ambient air 14 and the heat exchanger 11.
  • a second bypass device 18 is arranged in parallel with the second expansion member 16 and the heat exchanger 11.
  • the four-way valve 19 comprises a refrigerant fluid inlet FR through which the latter is admitted inside the four-way valve and an outlet of refrigerant FR through which the latter is discharged out of the chamber.
  • the inlet 20 is in direct and single relationship with the compressor 8 while the outlet 21 is in direct and unique relationship with the accumulator 9.
  • the entire refrigerant FR flows directly and necessarily to the inlet 20.
  • the entire refrigerant FR flows directly and necessarily to the accumulator 9.
  • the four-way valve 19 also comprises a first refrigerant circulation orifice 22 FR and a second refrigerant circulation orifice 23 FR .
  • the first flow hole 22 of FR coolant is in direct and unique relationship with the first fluid heat exchanger refrigerant / heat transfer fluid 12 while the second flow hole 23 of FR refrigerant fluid is in direct contact with the exchanger and single thermal 11.
  • the refrigerant fluid FR flows directly and completely between the first heat exchanger fluid coolant / heat transfer fluid 12 and the first refrigerant circulation port 22 FR .
  • the refrigerating fluid FR flows directly and completely between the heat exchanger 11 and the second refrigerant circulation orifice 23 FR .
  • the four-way valve 19 comprises a first channel 24 for circulating the refrigerant fluid FR from the first circulation orifice 22 to the outlet 21, and also comprises a second channel 25 for circulating the refrigerant fluid FR from the inlet 20 to the second circulation port 23.
  • the four-way valve 19 has a third channel 26 for circulating the refrigerant fluid FR from the inlet 20 to the first circulation port 22, and also has a fourth channel 27 for circulating the refrigerant fluid FR from the second orifice 23 to exit 21.
  • the radiator 29 of the secondary loop 13 is provided with at least one air mixing flap 31 which is operable between a closed position, visible on the fig.1 and fig.5 , in which the mixing flap 31 prohibits a passage of the air flow 2 through the radiator 29, and an open position, visible on the fig.2 to fig.4 , in which the mixing flap 31 allows such a passage.
  • the secondary loop 13 also comprises at least one heat transfer fluid / electrical auxiliary exchanger.
  • the reference 32 shows more particularly a fluid heat exchanger / motor 32, such as the vehicle engine, electric or hybrid, capable of allowing the movement of the vehicle.
  • Other electrical auxiliaries are conceivable, such as a battery or an electronic power unit referenced 33, associated with the engine of the vehicle.
  • the air conditioning system 1 finally comprises a temperature sensor 34 intended to measure the temperature Ta of the ambient air A penetrating through the second refrigerant / ambient air heat exchanger 14.
  • the sensor 34 is related to control means 35 of the implementation of the blower 4, the first bypass device 17, the second bypass device 18, the first channel 24, the second channel 25, the third channel 26, the fourth channel 27, the pump 28 and the mixing flap 31.
  • the control means 35 are for example constituent of an electronic control unit of the air conditioning system 1.
  • the control means 35 are particularly suitable for comparing the measured temperature Ta of the ambient air A with the first threshold temperature Ts1 and the second threshold temperature Ts2 . More precisely, the control means 35 are able to calculate a difference D between the measured temperature Ta of the ambient air A and the first threshold temperature Ts1 .
  • control means 35 put or do not implement the elements of the air conditioning system 1 which are under his control.
  • the sensor 34 and the control means 35 together constitute control means 36 of the implementation of the air conditioning system 1, these control means 36 being represented in alternating line-dot line in the figures.
  • the fig.1 represents the air conditioning system 1 implemented in a first heating mode when the temperature Ta of ambient air A is less than or equal to the temperature Ts .
  • the difference D Ta - Ts is negative or zero.
  • the present invention proposes to heat the air flow 2 only through the heat exchanger 11, the radiator 29 not being biased to heat-treat the air flow 2.
  • the first heating mode is a heating mode in which the air flow 2 is directly heated by an element of the air conditioning loop 7, namely the exchanger thermal 11; thus, the first mode heating mode heating "on air”.
  • the first channel 24 and the second channel 25 are used for the circulation of the refrigerant fluid FR inside the four-way valve 19 while the third channel 26 and the fourth channel 27 are inoperative.
  • the first bypass device 17 is opened so that the refrigerant FR bypasses the first expansion member 15 while the second bypass device 18 is closed so that the refrigerant fluid FR flows through the second expansion member 16 and the heat exchanger 11.
  • the mixing flap 31 is in the closed position and the pump 28 is inoperative so that the coolant FC does not circulate inside the secondary loop 13.
  • the blower 4 is activated for circulating the air flow 2 inside said installation 3.
  • the refrigerant fluid FR flows from the compressor 8 to the inlet 20 and then through the second channel 25 to the second circulation orifice 23 to reach the heat exchanger 11.
  • the latter acts as a gas cooler and heats the air flow 2 through it.
  • the refrigerant fluid FR then joins the first bypass device 17 bypassing the first expansion member 15, to then flow through the first heat exchanger fluid coolant / coolant 12.
  • the pump 28 is inoperative, almost no heat exchange n ' is operated at the first heat exchanger fluid coolant / heat transfer fluid 12 between the refrigerant FR and the heat transfer fluid FC .
  • the refrigerant fluid FR circulates towards the first circulation orifice 22, to take the first channel 24 and reach the exit 21.
  • the refrigerant fluid FR flows through the accumulator 9 to then return to the compressor 8.
  • the fig.2 represents the air conditioning system 1 implemented in a second heating mode when the temperature Ta is greater than the temperature Ts .
  • the difference D Ta - Ts is positive.
  • the present invention proposes to heat the air flow 2 only via the radiator 29, the heat exchanger 11 not being biased to thermally treat the air flow 2.
  • the second heating mode is a heating mode in which the air flow 2 is directly heated by an element of the secondary loop 13, namely the radiator 29; it thus qualifies the second heating mode of heating mode "on the water", with reference to the heat transfer fluid FC which consists mainly of water.
  • the first channel 24 and the second channel 25 are inoperative while the third channel 26 and the fourth channel 27 are used for the circulation of the refrigerant fluid FR inside the four-way valve 19.
  • the first bypass device 17 is closed so that the coolant FR circulates inside the first expansion member 15 while the second bypass device 18 is open so that the refrigerant FR bypasses the second 16 and the heat exchanger 11.
  • the mixing flap 31 is in the open position and the pump 28 is implemented so that the heat transfer fluid FC circulates inside the secondary loop 13.
  • the blower 4 is activated to circulate the flow of air 2 inside said installation 3.
  • the refrigerant fluid FR flows from the compressor 8 to the inlet 20, then through the third channel 26 to the first circulation port 22 to reach the first heat exchanger fluid coolant / heat transfer fluid 12.
  • the latter behaves like a gas cooler so as to heat the heat transfer fluid FC .
  • the secondary loop 13 draws heat from the air conditioning loop 7 via the first heat exchanger fluid coolant / heat transfer fluid 12, then yields the heat pulsed to the air stream 2 through the radiator 29.
  • the secondary loop 13 is arranged to also recover heat from the fluid exchanger coolant / motor 32.
  • the refrigerant FR then leaves the first heat exchanger fluid coolant / heat transfer fluid 12 to reach the first expansion member 15 where it undergoes relaxation.
  • the refrigerant fluid FR then flows to the second refrigerant / ambient air heat exchanger 14 which behaves like an evaporator.
  • the refrigerating fluid FR then joins the second bypass device 18 bypassing the second expansion member 16 and the heat exchanger 11, to then reach the second circulation orifice 23, take the fourth channel 27 to reach the outlet 21.
  • the refrigerating fluid FR flows through the accumulator 9 and then returns to the compressor 8.
  • the fig.3 represents the air conditioning system 1 implemented in a first dehumidification mode.
  • the first channel 24 and the second channel 25 are inoperative while the third channel 26 and the fourth channel 27 are used for the circulation of the refrigerant FR inside the four-way valve 19.
  • the first device bypass 17 is opened so that the refrigerant FR bypasses the first expansion member 15 while the second bypass device 18 is closed so that the refrigerant fluid FR flows inside the second expansion member 16 and of the heat exchanger 11.
  • the mixing flap 31 is in the open position and the pump 28 is implemented so that the coolant FC circulates inside the secondary loop 13.
  • the blower 4 is activated to circulate the flow of air 2 inside said installation 3.
  • the refrigerant fluid FR flows from the compressor 8 to the 20, then through the third channel 26 to the first circulation port 22 to reach the first heat exchanger fluid coolant / heat transfer fluid 12.
  • the latter behaves like a gas cooler so as to heat the coolant FC .
  • the air conditioning loop 7 is used to heat the air flow 2 prior to the delivery of the latter inside the passenger compartment and the secondary loop 13 is put to the contribution so that the radiator 29 also heats the air flow 2 by recovering heat from the first heat exchanger fluid coolant / heat transfer fluid 12 and the coolant heat exchanger / motor 32.
  • the refrigerant fluid FR then leaves the first heat exchanger fluid coolant / heat transfer fluid 12 to circulate through the first bypass device 17 bypassing the first expansion member 15.
  • the refrigerant fluid FR then flows to the second refrigerant fluid heat exchanger / ambient air 14 which behaves as a gas cooler warming ambient air A.
  • the refrigerant then joined EN the second expansion device 16 where it undergoes an expansion and Heat Exchanger 11 which acts as an evaporator.
  • These provisions are intended to cool and dehumidify the air flow 2 through the heat exchanger 11 prior to heating the air flow 2 by the radiator 29.
  • the refrigerant FR reaches the second circulation orifice 23, takes the fourth channel 27 to reach the outlet 21.
  • the refrigerant fluid FR flows through the accumulator 9 to return to the compressor 8.
  • the fig.4 represents the system 1 implemented in a second dehumidification mode.
  • the first channel 24 and the second channel 25 are inoperative while the third channel 26 and the fourth channel 27 are used for the circulation of the refrigerant FR inside the four-way valve 19.
  • the first device bypass 17 is closed so that the coolant FR circulates inside the first expansion member 15 and the second bypass device 18 is also closed so that the refrigerant fluid FR flows inside the second organ 16 and the heat exchanger 11.
  • the mixing flap 31 is in the open position and the pump 28 is implemented so that the heat transfer fluid FC circulates inside the secondary loop 13. Pulser 4 is activated to circulate the flow of air 2 inside said installation 3.
  • the refrigerant fluid FR flows from the compressor 8 to the inlet 20, then through the third channel 26 to the first circulation port 22 to reach the first heat exchanger fluid coolant / heat transfer fluid 12.
  • the latter behaves like a gas cooler so as to heat the coolant FC .
  • the air conditioning loop 7 is used to heat the air flow 2 prior to its delivery to the interior of the passenger compartment and the secondary loop 13 is brought into play so that the radiator 29 also warms the air air stream 2 by recovering heat from the coolant / motor heat exchanger 32 and the first refrigerant / heat transfer fluid heat exchanger 12.
  • the refrigerant fluid FR then leaves the first refrigerant / heat transfer fluid heat exchanger 12 to circulate through the first expansion member 15 where it undergoes a first expansion.
  • the refrigerant fluid FR then flows to the second refrigerant / ambient air heat exchanger 14 which behaves as an evaporator cooling the ambient air A.
  • the refrigerant fluid FR then joins the second expansion member 16 where it undergoes a second expansion, then joins the heat exchanger 11 which behaves as an evaporator. It is thus possible to regulate with respect to each other the first detent and the second detent.
  • These provisions are intended to cool and dehumidify the air flow 2 through the heat exchanger 11 prior to the heating of the air flow 2 by the radiator 29.
  • the refrigerant FR reaches the second circulation orifice 23 , takes the fourth channel 27 to reach the outlet 21.
  • the refrigerant FR flows through the accumulator 9 to return to the compressor 8.
  • the fig.5 represents the air conditioning system 1 implemented in an air conditioning mode.
  • the first channel 24 and the second channel 25 are inoperative while the third channel 26 and the fourth channel 27 are used for the circulation of the refrigerant fluid FR inside the four-way valve.
  • the first bypass device 17 is open so that the refrigerant FR bypasses the first expansion member 15 and the second bypass device is closed so that the refrigerant fluid FR flows inside the second body 16 and the heat exchanger 11.
  • the mixing flap 31 is in the closed position and the pump 28 is inoperative so that the heat transfer fluid FC does not circulate inside the secondary loop 13.
  • the blower 4 is activated to circulate the flow of air 2 inside said installation 3.
  • the refrigerant fluid FR flows from the compressor 8 to the inlet 20, then through the third channel 26 to the first circulation port 22 to reach the first heat exchanger fluid coolant / heat transfer fluid 12. The latter is virtually inoperative due to the shutdown of the pump 28.
  • the refrigerant FR then leaves the first heat exchanger fluid coolant / heat transfer fluid 12 to flow through the first bypass device 17 bypassing the first expansion member 15.
  • the refrigerant fluid FR then flows to the second refrigerant / ambient air heat exchanger 14 which behaves like a gas cooler by heating the ambient air A.
  • the refrigerant fluid FR then joins the second expansion member 16 where it undergoes expansion and the heat exchanger 11 which behaves as an evaporator.
  • the air conditioning system 1 of the present invention is able to operate in heating mode, dehumidification mode and air conditioning mode in the most satisfactory manner possible, in particular by discerning the first heating mode and the second heating mode according to the nature of the temperature Ta of the ambient air A with respect to the first threshold temperature Ts1.
  • All these provisions is also as possible, after an implementation of the air conditioning system 1 in air conditioning mode, to prohibit an implementation of the air conditioning system in the first mode of heating "on air” to favor the second mode of heating "on the water”.
  • These provisions are intended to prevent for the lapse of time T , for example between 15 min and 45 min, preferably of the order of 30 min, to prevent fogging on the windshield and / or the front windows of the vehicle. vehicle.

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  • Air-Conditioning For Vehicles (AREA)

Description

Domaine technique de l'invention.Technical Field of the Invention

L'invention est du domaine des installations de ventilation, de chauffage et/ou de climatisation d'un véhicule automobile électrique ou hybride. Elle a pour objet un système de climatisation coopérant avec une telle installation. Elle a aussi pour objet un procédé de mise en oeuvre d'un tel système selon divers modes de fonctionnement.The invention is in the field of ventilation, heating and / or air conditioning of an electric or hybrid motor vehicle. It relates to an air conditioning system cooperating with such an installation. It also relates to a method of implementing such a system according to various modes of operation.

Etat de la technique.State of the art

Un véhicule automobile électrique ou hybride, dont la propulsion est assurée au moins partiellement par un moteur électrique, est couramment équipé d'un système de ventilation, de chauffage et/ou de climatisation pour modifier les paramètres aérothermiques de l'air contenu à l'intérieur de l'habitacle du véhicule. Une telle modification est obtenue à partir de la délivrance d'un flux d'air à l'intérieur de l'habitacle.An electric or hybrid motor vehicle, whose propulsion is provided at least partially by an electric motor, is commonly equipped with a ventilation, heating and / or air conditioning system to modify the aerothermal parameters of the air contained in the inside the vehicle interior. Such a modification is obtained from the delivery of an air flow inside the passenger compartment.

Le système de climatisation comprend une installation de ventilation, de chauffage et/ou de climatisation principalement constituée d'un boîtier réalisé en matière plastique et logé sous une planche de bord du véhicule. Le boîtier canalise la circulation du flux d'air préalablement à la délivrance de ce dernier à l'intérieur de l'habitacle. A cet effet, le boîtier est pourvu d'au moins une bouche de dégivrage/désembuage pour délivrer le flux d'air vers un pare-brise et/ou des vitres avant du véhicule en vue de les dégivrer et/ou de les désembuer.The air conditioning system comprises a ventilation, heating and / or air conditioning installation consisting mainly of a housing made of plastic and housed under a dashboard of the vehicle. The housing channels the flow of air flow prior to the delivery of the latter inside the passenger compartment. For this purpose, the housing is provided with at least one defrosting / demisting port for delivering the airflow to a windshield and / or front windows of the vehicle with a view to de-icing and / or demisting.

Le système de climatisation comprend également une boucle de climatisation à l'intérieur de laquelle circule un fluide réfrigérant et une boucle secondaire à l'intérieur de laquelle circule un fluide caloporteur. Un premier échangeur de chaleur fluide réfrigérant / fluide caloporteur est constitutif à la fois de la boucle de climatisation et de la boucle secondaire de telle sorte que le fluide réfrigérant et le fluide caloporteur peuvent échanger de la chaleur l'un avec l'autre. On pourra par exemple se reporter au document US 2002/0036080 (ITOH et al ) qui décrit un tel système de climatisation.The air conditioning system also comprises an air conditioning loop inside which circulates a refrigerant and a secondary loop inside which circulates a heat transfer fluid. A first exchanger of heat coolant / heat transfer fluid is constitutive of both the air conditioning loop and the secondary loop so that the coolant and heat transfer fluid can exchange heat with each other. For example, we can refer to the document US 2002/0036080 (ITOH et al ) which describes such an air conditioning system.

La boucle de climatisation comprend un compresseur pour comprimer le fluide réfrigérant, une vanne quatre-voies, le premier échangeur de chaleur fluide réfrigérant / fluide caloporteur pour permettre au fluide réfrigérant de se refroidir à pression relativement constante en cédant de la chaleur au fluide caloporteur, au moins un organe de détente pour permettre une détente du fluide réfrigérant, un deuxième échangeur de chaleur fluide réfrigérant / air ambiant pour permettre un échange de chaleur entre le fluide réfrigérant et un air ambiant, tel que l'air extérieur au véhicule. La boucle de climatisation comprend aussi un échangeur thermique disposé à l'intérieur du boîtier pour que le fluide réfrigérant échange de la chaleur avec le flux d'air qui traverse ce dernier et un accumulateur de fluide réfrigérant pour empêcher une admission de fluide réfrigérant à l'état liquide à l'intérieur du compresseur.The air-conditioning loop comprises a compressor for compressing the cooling fluid, a four-way valve, the first refrigerant / heat transfer fluid heat exchanger to allow the cooling fluid to cool to a relatively constant pressure by yielding heat to the coolant, at least one expansion element to allow expansion of the cooling fluid, a second refrigerant / ambient air heat exchanger to allow heat exchange between the refrigerant and ambient air, such as the air outside the vehicle. The air conditioning loop also includes a heat exchanger disposed inside the housing for the refrigerant to exchange heat with the air flow therethrough and a refrigerant accumulator to prevent refrigerant admission to the refrigerant. liquid state inside the compressor.

La boucle secondaire comprend une pompe pour faire circuler le fluide caloporteur, le premier échangeur de chaleur fluide réfrigérant / fluide caloporteur pour permettre au fluide caloporteur de récupérer de la chaleur en provenance du fluide réfrigérant et un radiateur logé à l'intérieur de l'installation pour que le fluide caloporteur cède de la chaleur au flux d'air. Le radiateur est pourvu de volets pour autoriser ou interdire un passage du flux d'air à travers le radiateur.The secondary loop comprises a pump for circulating the coolant, the first coolant heat exchanger / heat transfer fluid to allow the heat transfer fluid to recover heat from the refrigerant and a radiator housed inside the installation for the heat transfer fluid to give heat to the air flow. The radiator is provided with shutters to allow or prohibit a passage of the air flow through the radiator.

Un tel système de climatisation est agencé pour permettre un dégivrage du deuxième échangeur de chaleur fluide réfrigérant / air ambiant.Such an air conditioning system is arranged to allow defrosting of the second refrigerant / ambient air heat exchanger.

Un problème posé par l'utilisation du système de climatisation décrit par US 2002/0036080 réside dans le fait que le système de climatisation n'est pas adapté pour fonctionner de manière efficace en mode chauffage et en mode climatisation dans lesquels il est respectivement recherché de réchauffer et de refroidir le flux d'air préalablement à sa délivrance à l'intérieur de l'habitacle. Plus particulièrement, un tel système n'est pas apte à fonctionner de manière efficace alternativement en mode chauffage et en mode climatisation. Plus précisément, un tel système ne permet pas de délivrer le flux d'air sans générer un embuement du pare-brise et/ou des vitres avant du véhicule, par exemple lors du passage d'un mode de fonctionnement du système de climatisation à un autre mode.A problem posed by the use of the air conditioning system described by US 2002/0036080 resides in the fact that the air conditioning system is not suitable to operate effectively in heating mode and air conditioning mode in which it is respectively desired to heat and cool the air flow prior to its delivery to the interior of the passenger compartment. More particularly, such a system is not able to operate effectively alternately in heating mode and in cooling mode. More specifically, such a system does not deliver the air flow without generating a fogging of the windshield and / or the front windows of the vehicle, for example when going from an operating mode of the air conditioning system to a other mode.

WO 03/051657 A1 divulgue un système de climatisation selon le préambule de la revendication 1. WO 03/051657 A1 discloses an air conditioning system according to the preamble of claim 1.

Objet de l'invention.Object of the invention

Le but de la présente invention est de proposer un système de climatisation destiné à équiper un véhicule automobile électrique ou hybride, un tel système offrant des modes de fonctionnement variés, notamment au moins un mode chauffage et un mode climatisation, un tel système de climatisation étant de surcroît agencé pour permettre un passage d'un mode de fonctionnement à un autre mode sans risque d'embuer un pare-brise et/ou des vitres avant du véhicule. Un autre but de la présente invention est de proposer une méthode de mise en oeuvre d'un tel système de climatisation qui permet un réchauffement d'un flux d'air le plus efficacement possible.The purpose of the present invention is to provide an air conditioning system for equipping an electric or hybrid motor vehicle, such a system offering various modes of operation, including at least one heating mode and an air conditioning mode, such an air conditioning system being moreover arranged to allow a transition from one mode of operation to another mode without risk of fogging a windshield and / or front windows of the vehicle. Another object of the present invention is to provide a method of implementing such an air conditioning system that allows a heating of an air flow as efficiently as possible.

Un système de climatisation de la présente invention est un système de climatisation pour véhicule automobile selon la revendication 1.An air-conditioning system of the present invention is an air-conditioning system for a motor vehicle according to claim 1.

Le premier, le deuxième, le troisième et le quatrième canal sont des chemins de circulation du fluide réfrigérant à l'intérieur de la vanne quatre-voies.The first, second, third and fourth channels are refrigerant flow paths within the four-way valve.

Le premier échangeur de chaleur fluide réfrigérant - fluide caloporteur, le premier organe de détente et le deuxième échangeur de chaleur fluide réfrigérant / air ambiant sont directement en série sur la boucle de climatisation, c'est-à-dire sans autre composant intermédiaire en dehors des conduites les reliant. L'entrée du premier dispositif de contournement est donc connectée entre le premier échangeur de chaleur fluide réfrigérant / fluide caloporteur et le premier organe de détente alors que la sortie du premier dispositif de contournement est connectée entre cet organe et le deuxième échangeur de chaleur fluide réfrigérant / air ambiant.The first heat exchanger fluid coolant - heat transfer fluid, the first expansion member and the second refrigerant fluid heat exchanger / ambient air are directly in series on the air conditioning loop, that is to say without other intermediate component outside pipes connecting them. The inlet of the first bypass device is thus connected between the first heat exchanger / coolant heat exchanger and the first expansion member while the output of the first bypass device is connected between this body and the second refrigerant fluid heat exchanger / ambiant air.

Le premier organe de détente est associé à un premier dispositif de contournement.The first detent member is associated with a first bypass device.

Un deuxième dispositif de contournement est disposé en parallèle du deuxième organe de détente et de l'échangeur thermique, en parallèle de ces deux composants. L'entrée du deuxième dispositif de contournement est donc immédiatement en amont du deuxième organe de détente et la sortie du deuxième dispositif de contournement est directement en aval de la sortie de l'échangeur thermique placé à l'intérieur de l'installation (selon le sens de circulation du fluide réfrigérant sur la figure 2).
Le compresseur est avantageusement disposé sur la boucle de climatisation entre une sortie de fluide réfrigérant FR que comporte la vanne quatre-voies et une entrée de fluide réfrigérant FR que comporte également la vanne quatre-voies.
Le compresseur est de préférence associé à un accumulateur qui est disposé sur la boucle de climatisation entre le compresseur et la sortie de fluide réfrigérant FR.A second bypass device is arranged in parallel with the second expansion member and the heat exchanger, in parallel with these two components. The input of the second bypass device is therefore immediately upstream of the second expansion element and the output of the second bypass device is directly downstream of the outlet of the heat exchanger placed inside the installation (according to the direction of circulation of the refrigerant on the figure 2 ).
The compressor is advantageously arranged on the air conditioning loop between a refrigerant fluid outlet FR that comprises the four-way valve and a refrigerant fluid inlet FR that also comprises the four-way valve.
The compressor is preferably associated with an accumulator which is arranged on the air conditioning loop between the compressor and the refrigerant outlet FR .

La boucle secondaire comprend préférentiellement une pompe et un échangeur fluide caloporteur / auxiliaire électrique.
L'auxiliaire électrique est par exemple un moteur électrique et/ou un boîtier électronique de puissance et/ou une batterie.The secondary loop preferably comprises a pump and a heat transfer fluid / electrical auxiliary exchanger.
The electrical auxiliary is for example an electric motor and / or an electronic power unit and / or a battery.

Le radiateur est avantageusement équipé d'au moins un volet de mixage d'un flux d'air circulant à l'intérieur de ladite installation.The radiator is advantageously equipped with at least one mixing flap of a flow of air circulating inside said installation.

Ledit système comprend avantageusement des moyens de commande de la mise en oeuvre du premier canal, du deuxième canal, du troisième canal, du quatrième canal, du premier dispositif de contournement, du deuxième dispositif de contournement, de la pompe et du volet de mixage.Said system advantageously comprises means for controlling the implementation of the first channel, the second channel, the third channel, the fourth channel, the first bypass device, the second bypass device, the pump and the mixing flap.

La mise en oeuvre des moyens de commande est préférentiellement placée sous la dépendance d'une information relative à une différence D prise entre une mesure d'une température Ta de l'air ambiant A et une première température seuil Ts1. The implementation of the control means is preferably placed under the control of information relating to a difference D between a measurement of a temperature Ta of ambient air A and a first threshold temperature Ts1.

Un procédé de mise en oeuvre d'un tel système de climatisation est principalement reconnaissable en ce que le procédé comporte :

  • un premier mode de chauffage du flux d'air qui est opéré lorsque la différence D est négative ou nulle,
  • un deuxième mode de chauffage du flux d'air qui est opéré lorsque la différence D est positive.
A method of implementing such an air conditioning system is mainly recognizable in that the method comprises:
  • a first heating mode of the airflow which is operated when the difference D is negative or zero,
  • a second heating mode of the air flow which is operated when the difference D is positive.

Plus particulièrement, le premier mode de chauffage consiste à ouvrir le premier canal et le deuxième canal, fermer le troisième canal et le quatrième canal, ouvrir le premier dispositif de contournement, fermer le deuxième dispositif de contournement, mettre le volet de mixage en position de fermeture et arrêter la pompe.More particularly, the first heating mode consists in opening the first channel and the second channel, closing the third channel and the fourth channel, opening the first bypass device, closing the second bypass device, putting the mixing flap in a position of close and stop the pump.

Plus particulièrement, le deuxième mode de chauffage consiste à fermer le premier canal et le deuxième canal, ouvrir le troisième canal et le quatrième canal, fermer le premier dispositif de contournement, ouvrir le deuxième dispositif de contournement, mettre le volet de mixage en position de fermeture et mettre en fonctionnement la pompe.More particularly, the second heating mode consists of closing the first channel and the second channel, opening the third channel and the fourth channel, closing the first bypass device, opening the second bypass device, putting the mixing flap in a position of closing and start the pump.

Plus particulièrement, le procédé comporte un premier mode déshumidification qui consiste à fermer le premier canal et le deuxième canal, ouvrir le troisième canal et le quatrième canal, ouvrir le premier dispositif de contournement, fermer le deuxième dispositif de contournement, mettre le volet de mixage en position d'ouverture et mettre en fonctionnement la pompe.More particularly, the method comprises a first dehumidification mode which consists in closing the first channel and the second channel, opening the third channel and the fourth channel, opening the first bypass device, closing the second bypass device, setting the mixing flap in the open position and put the pump into operation.

Plus particulièrement, le procédé comporte un deuxième mode déshumidification qui consiste à fermer le premier canal et le deuxième canal, ouvrir le troisième canal et le quatrième canal, fermer le premier dispositif de contournement, fermer le deuxième dispositif de contournement, mettre le volet de mixage en position d'ouverture et mettre en fonctionnement la pompe.More particularly, the method comprises a second dehumidification mode which consists of closing the first channel and the second channel, opening the third channel and the fourth channel, closing the first bypass device, closing the second bypass device, setting the mixing flap in the open position and put the pump into operation.

Plus particulièrement, le procédé comporte un mode climatisation qui consiste à fermer le premier canal et le deuxième canal, ouvrir le troisième canal et le quatrième canal, ouvrir le premier dispositif de contournement, fermer le deuxième dispositif de contournement, mettre le volet de mixage en position de fermeture et arrêter la pompe.More particularly, the method comprises an air conditioning mode which consists of closing the first channel and the second channel, opening the third channel and the fourth channel, opening the first bypass device, closing the second bypass device, putting the mixing flap into operation. closing position and stop the pump.

De manière avantageuse, après la mise en oeuvre du système de climatisation en mode climatisation, le procédé comporte un laps de temps T pendant lequel la mise en oeuvre du système de climatisation selon le premier mode chauffage est interdite et pendant lequel la mise en oeuvre du système de climatisation selon le deuxième mode chauffage est autorisée.Advantageously, after the operation of the air-conditioning system in cooling mode, the method comprises a time period T during which the implementation of the air conditioning system according to the first heating mode is prohibited and during which the implementation of the Air conditioning system according to the second heating mode is allowed.

Description des figures.Description of the figures.

La présente invention sera mieux comprise à la lecture de la description qui va en être faite d'exemples de réalisation, en relation avec les figures des planches annexées, dans lesquelles :

  • Les fig.1 à fig.5 sont des illustrations schématiques d'un système de climatisation de la présente invention selon des modes respectifs de fonctionnement.
The present invention will be better understood on reading the description which will be given of exemplary embodiments, in relation to the figures of the appended plates, in which:
  • The fig.1 to fig.5 are schematic illustrations of an air conditioning system of the present invention according to respective modes of operation.

Sur les figures, un véhicule automobile est équipé d'un système de climatisation 1 pour modifier les paramètres aérothermiques de l'air contenu à l'intérieur de l'habitacle du véhicule. Une telle modification est obtenue à partir de la délivrance d'au moins un flux d'air 2 à l'intérieur de l'habitacle. A cet effet, le système de climatisation 1 comprend une installation de ventilation, de chauffage et/ou de climatisation 3 principalement constituée d'un boîtier réalisé en matière plastique. L'installation 3 est logée sous une planche de bord du véhicule et canalise la circulation du flux d'air 2. L'installation 3 loge un pulseur 4 pour faire circuler le flux d'air 2 depuis au moins une bouche d'admission d'air 5 vers au moins une bouche de délivrance d'air 6 que comporte le boîtier. La bouche de délivrance d'air 6 est notamment une bouche de dégivrage/désembuage qui est destinée à délivrer le flux d'air 2 vers le pare-brise et/ou les vitres avant du véhicule.In the figures, a motor vehicle is equipped with an air conditioning system 1 for modifying the aerothermal parameters of the air contained inside the passenger compartment of the vehicle. Such a modification is obtained from the delivery of at least one air flow 2 inside the passenger compartment. For this purpose, the air conditioning system 1 comprises a ventilation system, heating and / or air conditioning 3 mainly consisting of a housing made of plastic material. The installation 3 is housed under a dashboard of the vehicle and channels the circulation of the air flow 2. The installation 3 houses a blower 4 to circulate the air flow 2 from at least one intake port d air 5 to at least one air delivery mouth 6 that includes the housing. The air delivery port 6 is in particular a defrosting / defogging mouth which is intended to deliver the flow of air 2 to the windshield and / or the front windows of the vehicle.

Le système de climatisation 1 comprend une boucle de climatisation 7 à l'intérieur de laquelle circule un fluide réfrigérant FR, tel que du dioxyde de carbone connu sous l'appellation R744. La boucle de climatisation 7 comprend un compresseur 8 pour comprimer le fluide réfrigérant FR à l'état gazeux, et optionnellement un accumulateur 9 pour empêcher une admission de fluide réfrigérant FR à l'état liquide à l'intérieur du compresseur 8. L'accumulateur 9 est disposé sur la boucle de climatisation 7 en amont du compresseur 8 selon un sens de circulation 10 du fluide réfrigérant FR à l'intérieur du compresseur 8 et de l'accumulateur 9. La boucle de climatisation 7 comprend également un échangeur thermique 11 qui est logé à l'intérieur de l'installation 3. L'échangeur thermique 11 est destiné à modifier la température du flux d'air 2 qui circule à l'intérieur de l'installation 3 et qui traverse l'échangeur thermique 11. La boucle de climatisation 7 comprend aussi un premier échangeur de chaleur fluide réfrigérant / fluide caloporteur 12 pour permettre au fluide réfrigérant FR d'échanger de la chaleur avec un fluide caloporteur FÇ circulant à l'intérieur d'une boucle secondaire 13. La boucle de climatisation 7 comprend enfin une vanne quatre-voies 19 pour configurer la boucle de climatisation 7 en mode chauffage ou en mode climatisation. En mode chauffage, l'échangeur thermique 11 se comporte comme un condenseur et tend à réchauffer le flux d'air 2 qui le traverse. En mode climatisation, l'échangeur thermique 11 se comporte comme un évaporateur et tend à refroidir le flux d'air 2 qui le traverse.The air conditioning system 1 comprises an air conditioning loop 7 inside which circulates a refrigerant fluid FR , such as carbon dioxide known under the name R744. The air conditioning loop 7 comprises a compressor 8 for compressing the refrigerating fluid FR in the gaseous state, and optionally an accumulator 9 for preventing an intake of refrigerant fluid FR in the liquid state inside the compressor 8. The accumulator 9 is disposed on the air conditioning loop 7 upstream of the compressor 8 in a direction of circulation 10 of the refrigerant FR inside the compressor 8 and the accumulator 9. The air conditioning loop 7 also comprises a heat exchanger 11 which is housed inside the installation 3. The heat exchanger 11 is intended to change the temperature of the air flow 2 which circulates inside the installation 3 and which passes through the heat exchanger 11. The air conditioning circuit 7 also comprises a first fluid heat exchanger refrigerant / heat transfer fluid 12 to enable the refrigerant fluid FR exchanging heat with a coolant circulating Fc within a secondary loop 13. Loop air conditioning 7 finally includes a four-way valve 19 to configure the air conditioning loop 7 in heating mode or air conditioning mode. In heating mode, the heat exchanger 11 behaves like a condenser and tends to heat the flow of air 2 which passes through it. In air conditioning mode, the heat exchanger 11 behaves like an evaporator and tends to cool the flow of air 2 which passes through it.

Le système de climatisation 1 comprend également la boucle secondaire 13 à l'intérieur de laquelle circule le fluide caloporteur FC, tel qu'un mélange d'eau et de glycol. La boucle secondaire 13 comprend le premier échangeur de chaleur fluide réfrigérant / fluide caloporteur 12, une pompe 28 et un radiateur 29. Ce dernier est logé à l'intérieur de ladite installation 3 en aval de l'échangeur thermique 11 selon un sens d'écoulement 30 du flux d'air 2 à l'intérieur de l'installation 3.The air conditioning system 1 also comprises the secondary loop 13 inside which circulates the coolant FC , such as a mixture of water and glycol. The secondary loop 13 comprises the first heat exchanger / coolant heat exchanger 12, a pump 28 and a radiator 29. The latter is housed inside said installation 3 downstream of the heat exchanger 11 in a direction of flow of the air stream 2 inside the installation 3.

Au cours d'une journée d'utilisation du véhicule et selon une température Ta d'un air ambiant A, tel que l'air extérieur au véhicule, il est fréquent d'avoir à utiliser le système de climatisation 1 d'abord en mode chauffage, puis en mode climatisation et enfin à nouveau en mode chauffage. En effet, en début de journée, lorsque la température de l'air ambiant A est fraîche, c'est-à-dire inférieure à une première température seuil Ts1, par exemple de l'ordre de 5°C, il est souhaitable de faire fonctionner le système de climatisation 1 en mode chauffage. Puis, la température de l'air ambiant A augmentant jusqu'à excéder une deuxième température seuil Ts2, par exemple de l'ordre de 20°C, il est souhaitable de faire fonctionner le système de climatisation 1 en mode climatisation. Puis, en fin de journée, la température de l'air ambiant A baissant, jusqu'à devenir inférieure à la première température seuil Ts1, il est souhaitable de faire fonctionner le système de climatisation 1 à nouveau en mode chauffage.During a day of use of the vehicle and at a temperature Ta of an ambient air A , such as the air outside the vehicle, it is common to have to use the air conditioning system 1 first mode heating, then in cooling mode and finally again in heating mode. Indeed, at the beginning of the day, when the ambient air temperature A is cool, that is to say lower than a first threshold temperature Ts1 , for example of the order of 5 ° C, it is desirable to operate air conditioning system 1 in heating mode. Then, the ambient air temperature A increasing to exceed a second threshold temperature Ts2 , for example of the order of 20 ° C, it is desirable to operate the air conditioning system 1 in air conditioning mode. Then, at the end of the day, the ambient air temperature A decreasing, until becoming lower than the first threshold temperature Ts1 , it is desirable to operate the air conditioning system 1 again in heating mode.

En mode climatisation, l'échangeur thermique 11 se comportant comme un évaporateur, une vapeur d'eau portée par le flux d'air 2 tend à se condenser sur une surface externe S de l'échangeur thermique 11. Lors du passage en mode chauffage, l'échangeur thermique 11 se comportant alors comme un condenseur, l'eau condensée sur la surface externe S de l'échangeur thermique 11 se vaporise et tend à se condenser sur le pare-brise et/ou les vitres avant du véhicule. La présente invention remédie à cet inconvénient d'un système de climatisation de l'art antérieur en proposant un système de climatisation 1 agencé de manière à pouvoir réchauffer le flux d'air 2 par l'intermédiaire de l'échangeur thermique 11 et/ou par l'intermédiaire du radiateur 29, puis de refroidir le flux d'air 2 par l'intermédiaire de l'échangeur thermique 11, puis de réchauffer le flux d'air 2 par l'intermédiaire du radiateur 29, puis de réchauffer le flux d'air 2 par l'intermédiaire de l'échangeur thermique 11. Ainsi, lors d'un passage du mode climatisation au mode chauffage, la présente invention propose d'utiliser préférentiellement pendant un laps de temps T, un chauffage du flux d'air 2 par l'intermédiaire du radiateur 29, pour permettre à l'échangeur thermique 11 de s'assécher, c'est-à-dire de céder lentement l'eau condensée sur sa surface externe S au flux d'air 2, puis, le laps de temps T étant écoulé, la présente invention propose de réchauffer le flux d'air 2 par l'intermédiaire de l'échangeur thermique 11, dont la surface externe S est devenue exempte d'eau condensée.In cooling mode, the heat exchanger 11 behaving like an evaporator, a water vapor carried by the air stream 2 tends to condense on an external surface S of the heat exchanger 11. When switching to heating mode, the heat exchanger 11 then behaving like a condenser, the condensed water on the outer surface S of the heat exchanger 11 vaporizes and tends to condense on the windshield and / or the front windows of the vehicle. The present invention overcomes this drawback of an air conditioning system of the prior art by proposing an air conditioning system 1 arranged so as to heat the air flow 2 through the heat exchanger 11 and / or through the radiator 29, then to cool the air flow 2 through the heat exchanger 11, then to heat the air flow 2 via the radiator 29, and then to heat the flow by way of the heat exchanger 11. Thus, during a transition from air conditioning mode to heating mode, the present invention proposes to preferentially use for a period of time T , a heating of the flow of air 2 through the radiator 29, to allow the heat exchanger 11 to dry out, that is to say, to slowly transfer the condensed water on its outer surface S to the air stream 2, then the lapse of time T having elapsed, the present invention proposes heat the air flow 2 through the heat exchanger 11, the outer surface S has become free of condensed water.

Un tel but est atteint à partir du système de climatisation 1 décrit ci-après.Such a goal is achieved from the air conditioning system 1 described below.

La boucle de climatisation 7 du système de climatisation 1 comprend un deuxième échangeur de chaleur fluide réfrigérant / air ambiant 14 pour permettre un échange de chaleur entre le fluide réfrigérant FR et l'air ambiant A. Le deuxième échangeur de chaleur fluide réfrigérant / air ambiant 14 est placé à l'avant du véhicule pour faciliter un tel échange de chaleur. La boucle de climatisation 7 comprend aussi deux organes de détente 15,16 chacun associé à un dispositif de contournement, ou vanne de contournement, respectif 17,18. Les dispositifs de contournement 17 et 18 sont destinés à autoriser ou interdire une circulation du fluide réfrigérant FR à l'intérieur des organes de détente 15,16 auquel ils sont respectivement affectés. Un premier organe de détente 15, associé à un premier dispositif de contournement 17, est interposé entre le premier échangeur de chaleur fluide réfrigérant / fluide caloporteur 12 et le deuxième échangeur de chaleur fluide réfrigérant / air ambiant 14. Un deuxième organe de détente 16 est interposé entre le deuxième échangeur de chaleur fluide réfrigérant / air ambiant 14 et l'échangeur thermique 11. Un deuxième dispositif de contournement 18 est disposé en parallèle du deuxième organe de détente 16 et de l'échangeur thermique 11.The air conditioning circuit 7 of the air conditioning system 1 comprises a second refrigerant / ambient air heat exchanger 14 to allow a heat exchange between the refrigerating fluid FR and the ambient air A. The second refrigerant / ambient air heat exchanger 14 is placed at the front of the vehicle to facilitate such a heat exchange. The air conditioning loop 7 also comprises two expansion members 15,16 each associated with a bypass device, or bypass valve, respectively 17,18. The bypass devices 17 and 18 are intended to allow or prohibit a circulation of the refrigerant fluid FR inside the expansion members 15,16 to which they are respectively affected. A first detent 15, associated with a first bypass device 17, is interposed between the first heat exchanger fluid coolant / heat transfer fluid 12 and the second heat exchanger refrigerant fluid / ambient air 14. A second expansion member 16 is interposed between the second heat exchanger refrigerant / ambient air 14 and the heat exchanger 11. A second bypass device 18 is arranged in parallel with the second expansion member 16 and the heat exchanger 11.

La vanne quatre-voies 19 comporte une entrée 20 de fluide réfrigérant FR à travers laquelle ce dernier est admis à l'intérieur de la vanne quatre-voies 19 et une sortie 21 de fluide réfrigérant FR à travers laquelle ce dernier est évacué hors de la vanne quatre-voies 19. L'entrée 20 est en relation directe et unique avec le compresseur 8 tandis que la sortie 21 est en relation directe et unique avec l'accumulateur 9. Ainsi, en sortie du compresseur 8, la totalité du fluide réfrigérant FR s'écoule directement et obligatoirement vers l'entrée 20. De même, lors de son évacuation hors de la vanne quatre-voies 19 par l'intermédiaire de la sortie 21, la totalité du fluide réfrigérant FR s'écoule directement et obligatoirement vers l'accumulateur 9.The four-way valve 19 comprises a refrigerant fluid inlet FR through which the latter is admitted inside the four-way valve and an outlet of refrigerant FR through which the latter is discharged out of the chamber. four-way valve 19. The inlet 20 is in direct and single relationship with the compressor 8 while the outlet 21 is in direct and unique relationship with the accumulator 9. Thus, at the outlet of the compressor 8, the entire refrigerant FR flows directly and necessarily to the inlet 20. Similarly, during its evacuation from the four-way valve 19 via the outlet 21, the entire refrigerant FR flows directly and necessarily to the accumulator 9.

La vanne quatre-voies 19 comporte également un premier orifice de circulation 22 de fluide réfrigérant FR et un deuxième orifice de circulation 23 de fluide réfrigérant FR. Le premier orifice de circulation 22 de fluide réfrigérant FR est en relation directe et unique avec le premier échangeur de chaleur fluide réfrigérant / fluide caloporteur 12 tandis que le deuxième orifice de circulation 23 de fluide réfrigérant FR est en relation directe et unique avec l'échangeur thermique 11. Ainsi, le fluide réfrigérant FR circule directement et en totalité entre le premier échangeur de chaleur fluide réfrigérant / fluide caloporteur 12 et le premier orifice de circulation 22 de fluide réfrigérant FR. De même, le fluide réfrigérant FR circule directement et en totalité entre l'échangeur thermique 11 et le deuxième orifice de circulation 23 de fluide réfrigérant FR. Autrement dit, il n'existe aucun embranchement ni entre le premier échangeur de chaleur fluide réfrigérant / fluide caloporteur 12 et le premier orifice de circulation 22 de fluide réfrigérant FR, ni entre l'échangeur thermique 11 et le deuxième orifice de circulation 23 de fluide réfrigérant FR. The four-way valve 19 also comprises a first refrigerant circulation orifice 22 FR and a second refrigerant circulation orifice 23 FR . The first flow hole 22 of FR coolant is in direct and unique relationship with the first fluid heat exchanger refrigerant / heat transfer fluid 12 while the second flow hole 23 of FR refrigerant fluid is in direct contact with the exchanger and single thermal 11. Thus, the refrigerant fluid FR flows directly and completely between the first heat exchanger fluid coolant / heat transfer fluid 12 and the first refrigerant circulation port 22 FR . Likewise, the refrigerating fluid FR flows directly and completely between the heat exchanger 11 and the second refrigerant circulation orifice 23 FR . In other words, there is no branching or between the first refrigerant / fluid heat exchanger coolant 12 and the first refrigerant circulation port 22 FR , or between the heat exchanger 11 and the second refrigerant circulation port 23 FR.

Plus particulièrement sur la fig.1, la vanne quatre-voies 19 comporte un premier canal 24 pour faire circuler le fluide réfrigérant FR depuis le premier orifice de circulation 22 vers la sortie 21, et comporte aussi un deuxième canal 25 pour faire circuler le fluide réfrigérant FR depuis l'entrée 20 vers le deuxième orifice de circulation 23.More particularly on the fig.1 the four-way valve 19 comprises a first channel 24 for circulating the refrigerant fluid FR from the first circulation orifice 22 to the outlet 21, and also comprises a second channel 25 for circulating the refrigerant fluid FR from the inlet 20 to the second circulation port 23.

Plus particulièrement sur les fig.2 à fig.5, la vanne quatre-voies 19 comporte un troisième canal 26 pour faire circuler le fluide réfrigérant FR depuis l'entrée 20 vers le premier orifice de circulation 22, et comporte aussi un quatrième canal 27 pour faire circuler le fluide réfrigérant FR depuis le deuxième orifice de circulation 23 vers la sortie 21.More particularly on fig.2 to fig.5 , the four-way valve 19 has a third channel 26 for circulating the refrigerant fluid FR from the inlet 20 to the first circulation port 22, and also has a fourth channel 27 for circulating the refrigerant fluid FR from the second orifice 23 to exit 21.

Le radiateur 29 de la boucle secondaire 13 est pourvu d'au moins un volet de mixage d'air 31 qui est manoeuvrable entre une position de fermeture, visible sur les fig.1 et fig.5, dans laquelle le volet de mixage 31 interdit un passage du flux d'air 2 à travers le radiateur 29, et une position d'ouverture, visible sur les fig.2 à fig.4, dans laquelle le volet de mixage 31 autorise un tel passage. La boucle secondaire 13 comprend également au moins un échangeur fluide caloporteur / auxiliaire électrique. La référence 32 montre plus particulièrement un échangeur fluide caloporteur / moteur 32, tel que le moteur du véhicule, électrique ou hybride, apte à permettre le déplacement du véhicule. D'autres auxiliaires électriques sont envisageables tel qu'une batterie ou un boîtier électronique de puissance référencé 33, associé au moteur du véhicule.The radiator 29 of the secondary loop 13 is provided with at least one air mixing flap 31 which is operable between a closed position, visible on the fig.1 and fig.5 , in which the mixing flap 31 prohibits a passage of the air flow 2 through the radiator 29, and an open position, visible on the fig.2 to fig.4 , in which the mixing flap 31 allows such a passage. The secondary loop 13 also comprises at least one heat transfer fluid / electrical auxiliary exchanger. The reference 32 shows more particularly a fluid heat exchanger / motor 32, such as the vehicle engine, electric or hybrid, capable of allowing the movement of the vehicle. Other electrical auxiliaries are conceivable, such as a battery or an electronic power unit referenced 33, associated with the engine of the vehicle.

Le système de climatisation 1 comprend enfin un capteur de température 34 destiné à mesurer la température Ta de l'air ambiant A pénétrant à travers le deuxième échangeur de chaleur fluide réfrigérant / air ambiant 14. Le capteur 34 est en relation avec des moyens de commande 35 de la mise en oeuvre du pulseur 4, du premier dispositif de contournement 17, du deuxième dispositif de contournement 18, du premier canal 24, du deuxième canal 25, du troisième canal 26, du quatrième canal 27, de la pompe 28 et du volet de mixage 31. Les moyens de commande 35 sont par exemple constitutifs d'une unité de commande électronique du système de climatisation 1. Les moyens de commande 35 sont notamment aptes à comparer la température Ta mesurée de l'air ambiant A avec la première température seuil Ts1 et la deuxième température seuil Ts2. Plus précisément, les moyens de commande 35 sont à même de calculer une différence D prise entre la température Ta mesurée de l'air ambiant A et la première température seuil Ts1. Selon la nature de cette différence D, les moyens de commande 35 mettent ou ne mettent pas en oeuvre les éléments du système de climatisation 1 qui sont placés sous son contrôle. Ainsi, le capteur 34 et les moyens de commande 35 constituent conjointement des moyens de contrôle 36 de la mise en oeuvre du système de climatisation 1, ces moyens de contrôle 36 étant représentés en ligne alternée point-trait sur les figures.The air conditioning system 1 finally comprises a temperature sensor 34 intended to measure the temperature Ta of the ambient air A penetrating through the second refrigerant / ambient air heat exchanger 14. The sensor 34 is related to control means 35 of the implementation of the blower 4, the first bypass device 17, the second bypass device 18, the first channel 24, the second channel 25, the third channel 26, the fourth channel 27, the pump 28 and the mixing flap 31. The control means 35 are for example constituent of an electronic control unit of the air conditioning system 1. The control means 35 are particularly suitable for comparing the measured temperature Ta of the ambient air A with the first threshold temperature Ts1 and the second threshold temperature Ts2 . More precisely, the control means 35 are able to calculate a difference D between the measured temperature Ta of the ambient air A and the first threshold temperature Ts1 . Depending on the nature of this difference D , the control means 35 put or do not implement the elements of the air conditioning system 1 which are under his control. Thus, the sensor 34 and the control means 35 together constitute control means 36 of the implementation of the air conditioning system 1, these control means 36 being represented in alternating line-dot line in the figures.

Sur les fig.1 à fig.5 sont représentés en traits pleins les éléments du système de climatisation 1 qui sont mis en oeuvre, c'est-à-dire à l'intérieur desquels le fluide réfrigérant FR circule, tandis que sont représentés en traits pointillés les éléments du système de climatisation 1 qui sont inopérants, c'est-à-dire à l'intérieur desquels le fluide réfrigérant FR ne circule pas.On the fig.1 to fig.5 are represented in solid lines the elements of the air conditioning system 1 which are implemented, that is to say within which the refrigerant fluid FR flows, while are represented in dotted lines the elements of the air conditioning system 1 which are inoperative, that is to say within which the refrigerant fluid FR does not circulate.

La fig.1 représente le système de climatisation 1 mis en oeuvre en un premier mode chauffage lorsque la température Ta de l'air ambiant A est inférieure ou égale à la température Ts. Dans ce cas, la différence D = Ta - Ts est négative ou nulle. Dans cette configuration, la présente invention propose de chauffer le flux d'air 2 seulement par l'intermédiaire de l'échangeur thermique 11, le radiateur 29 n'étant pas sollicité pour traiter thermiquement le flux d'air 2. Le premier mode chauffage est un mode chauffage dans lequel le flux d'air 2 est directement réchauffé par un élément de la boucle de climatisation 7, à savoir l'échangeur thermique 11 ; on qualifie ainsi le premier mode de chauffage de mode de chauffage « sur l'air ».The fig.1 represents the air conditioning system 1 implemented in a first heating mode when the temperature Ta of ambient air A is less than or equal to the temperature Ts . In this case, the difference D = Ta - Ts is negative or zero. In this configuration, the present invention proposes to heat the air flow 2 only through the heat exchanger 11, the radiator 29 not being biased to heat-treat the air flow 2. The first heating mode is a heating mode in which the air flow 2 is directly heated by an element of the air conditioning loop 7, namely the exchanger thermal 11; thus, the first mode heating mode heating "on air".

Selon ce premier mode de chauffage, le premier canal 24 et le deuxième canal 25 sont utilisés pour la circulation du fluide réfrigérant FR à l'intérieur de la vanne quatre-voies 19 tandis que le troisième canal 26 et le quatrième canal 27 sont inopérants. Le premier dispositif de contournement 17 est ouvert de telle sorte que le fluide réfrigérant FR contourne le premier organe de détente 15 tandis que le deuxième dispositif de contournement 18 est fermé de telle sorte que le fluide réfrigérant FR circule à travers le deuxième organe de détente 16 et l'échangeur thermique 11. Le volet de mixage 31 est en position de fermeture et la pompe 28 est inopérante de telle sorte que le fluide caloporteur FC ne circule pas à l'intérieur de la boucle secondaire 13. Le pulseur 4 est activé pour faire circuler le flux d'air 2 à l'intérieur de ladite installation 3. A l'intérieur de la boucle de climatisation 7, le fluide réfrigérant FR circule depuis le compresseur 8 vers l'entrée 20, puis à travers le deuxième canal 25 vers le deuxième orifice de circulation 23 pour atteindre l'échangeur thermique 11. Ce dernier se comporte comme un refroidisseur de gaz et réchauffe le flux d'air 2 qui le traverse. Ces dispositions sont telles que la boucle de climatisation 7 est mise à profit pour réchauffer le flux d'air 2 préalablement à sa délivrance à l'intérieur de l'habitacle. Le fluide réfrigérant FR quitte ensuite l'échangeur thermique pour atteindre le deuxième organe de détente 16 où il subit une détente. Le fluide réfrigérant FR s'écoule alors vers le deuxième échangeur de chaleur fluide réfrigérant / air ambiant 14 qui se comporte comme un évaporateur. Le fluide réfrigérant FR rejoint alors le premier dispositif de contournement 17 en contournant le premier organe de détente 15, pour circuler ensuite à travers le premier échangeur de chaleur fluide réfrigérant / fluide caloporteur 12. La pompe 28 étant inopérante, quasiment aucun échange thermique n'est opéré au niveau du premier échangeur de chaleur fluide réfrigérant / fluide caloporteur 12 entre le fluide réfrigérant FR et le fluide caloporteur FC. Puis le fluide réfrigérant FR, circule vers le premier orifice de circulation 22, pour emprunter le premier canal 24 et rejoindre la sortie 21. Finalement, le fluide réfrigérant FR s'écoule à travers l'accumulateur 9 pour retourner ensuite au compresseur 8.According to this first heating mode, the first channel 24 and the second channel 25 are used for the circulation of the refrigerant fluid FR inside the four-way valve 19 while the third channel 26 and the fourth channel 27 are inoperative. The first bypass device 17 is opened so that the refrigerant FR bypasses the first expansion member 15 while the second bypass device 18 is closed so that the refrigerant fluid FR flows through the second expansion member 16 and the heat exchanger 11. The mixing flap 31 is in the closed position and the pump 28 is inoperative so that the coolant FC does not circulate inside the secondary loop 13. The blower 4 is activated for circulating the air flow 2 inside said installation 3. Inside the air conditioning loop 7, the refrigerant fluid FR flows from the compressor 8 to the inlet 20 and then through the second channel 25 to the second circulation orifice 23 to reach the heat exchanger 11. The latter acts as a gas cooler and heats the air flow 2 through it. These provisions are such that the air conditioning loop 7 is used to heat the air flow 2 prior to its delivery to the interior of the passenger compartment. The coolant FR then leaves the heat exchanger to reach the second expansion member 16 where it undergoes relaxation. The refrigerant fluid FR then flows to the second refrigerant / ambient air heat exchanger 14 which behaves like an evaporator. The refrigerant fluid FR then joins the first bypass device 17 bypassing the first expansion member 15, to then flow through the first heat exchanger fluid coolant / coolant 12. The pump 28 is inoperative, almost no heat exchange n ' is operated at the first heat exchanger fluid coolant / heat transfer fluid 12 between the refrigerant FR and the heat transfer fluid FC . Then the refrigerant fluid FR circulates towards the first circulation orifice 22, to take the first channel 24 and reach the exit 21. Finally, the refrigerant fluid FR flows through the accumulator 9 to then return to the compressor 8.

La fig.2 représente le système de climatisation 1 mis en oeuvre en un deuxième mode chauffage lorsque la température Ta est supérieure à la température Ts. Dans ce cas, la différence D = Ta - Ts est positive. Dans cette configuration, la présente invention propose de chauffer le flux d'air 2 seulement par l'intermédiaire du radiateur 29, l'échangeur thermique 11 n'étant pas sollicité pour traiter thermiquement le flux d'air 2. Le deuxième mode chauffage est un mode chauffage dans lequel le flux d'air 2 est directement réchauffé par un élément de la boucle secondaire 13, à savoir le radiateur 29 ; on qualifie ainsi le deuxième mode de chauffage de mode de chauffage « sur l'eau », en référence au fluide caloporteur FC qui est principalement constitué d'eau.The fig.2 represents the air conditioning system 1 implemented in a second heating mode when the temperature Ta is greater than the temperature Ts . In this case, the difference D = Ta - Ts is positive. In this configuration, the present invention proposes to heat the air flow 2 only via the radiator 29, the heat exchanger 11 not being biased to thermally treat the air flow 2. The second heating mode is a heating mode in which the air flow 2 is directly heated by an element of the secondary loop 13, namely the radiator 29; it thus qualifies the second heating mode of heating mode "on the water", with reference to the heat transfer fluid FC which consists mainly of water.

Selon ce deuxième mode de chauffage, le premier canal 24 et le deuxième canal 25 sont inopérants tandis que le troisième canal 26 et le quatrième canal 27 sont utilisés pour la circulation du fluide réfrigérant FR à l'intérieur de la vanne quatre-voies 19. Le premier dispositif de contournement 17 est fermé de telle sorte que le fluide réfrigérant FR circule à l'intérieur du premier organe de détente 15 tandis que le deuxième dispositif de contournement 18 est ouvert de telle sorte que le fluide réfrigérant FR contourne le deuxième organe de détente 16 et l'échangeur thermique 11. Le volet de mixage 31 est en position d'ouverture et la pompe 28 est mise en oeuvre de telle sorte que le fluide caloporteur FC circule à l'intérieur de la boucle secondaire 13. Le pulseur 4 est activé pour faire circuler le flux d'air 2 à l'intérieur de ladite installation 3. A l'intérieur de la boucle de climatisation 7, le fluide réfrigérant FR circule depuis le compresseur 8 vers l'entrée 20, puis à travers le troisième canal 26 vers le premier orifice de circulation 22 pour atteindre le premier échangeur de chaleur fluide réfrigérant / fluide caloporteur 12. Ce dernier se comporte comme un refroidisseur de gaz de manière à réchauffer le fluide caloporteur FC. Ainsi, la boucle secondaire 13 puise de la chaleur auprès de la boucle de climatisation 7 par l'intermédiaire du premier échangeur de chaleur fluide réfrigérant / fluide caloporteur 12, puis cède la chaleur puisée au flux d'air 2 par l'intermédiaire du radiateur 29. De plus, la boucle secondaire 13 est agencée pour récupérer également de la chaleur auprès de l'échangeur fluide caloporteur / moteur 32. Le fluide réfrigérant FR quitte ensuite le premier échangeur de chaleur fluide réfrigérant / fluide caloporteur 12 pour atteindre le premier organe de détente 15 où il subit une détente. Le fluide réfrigérant FR s'écoule alors vers le deuxième échangeur de chaleur fluide réfrigérant / air ambiant 14 qui se comporte comme un évaporateur. Le fluide réfrigérant FR rejoint alors le deuxième dispositif de contournement 18 en contournant le deuxième organe de détente 16 et l'échangeur thermique 11, pour rejoindre ensuite le deuxième orifice de circulation 23, emprunter le quatrième canal 27 pour atteindre la sortie 21. Finalement, le fluide réfrigérant FR s'écoule à travers l'accumulateur 9 pour retourner ensuite au compresseur 8.According to this second heating mode, the first channel 24 and the second channel 25 are inoperative while the third channel 26 and the fourth channel 27 are used for the circulation of the refrigerant fluid FR inside the four-way valve 19. The first bypass device 17 is closed so that the coolant FR circulates inside the first expansion member 15 while the second bypass device 18 is open so that the refrigerant FR bypasses the second 16 and the heat exchanger 11. The mixing flap 31 is in the open position and the pump 28 is implemented so that the heat transfer fluid FC circulates inside the secondary loop 13. The blower 4 is activated to circulate the flow of air 2 inside said installation 3. Inside the air conditioning loop 7, the refrigerant fluid FR flows from the compressor 8 to the inlet 20, then through the third channel 26 to the first circulation port 22 to reach the first heat exchanger fluid coolant / heat transfer fluid 12. The latter behaves like a gas cooler so as to heat the heat transfer fluid FC . Thus, the secondary loop 13 draws heat from the air conditioning loop 7 via the first heat exchanger fluid coolant / heat transfer fluid 12, then yields the heat pulsed to the air stream 2 through the radiator 29. In addition, the secondary loop 13 is arranged to also recover heat from the fluid exchanger coolant / motor 32. The refrigerant FR then leaves the first heat exchanger fluid coolant / heat transfer fluid 12 to reach the first expansion member 15 where it undergoes relaxation. The refrigerant fluid FR then flows to the second refrigerant / ambient air heat exchanger 14 which behaves like an evaporator. The refrigerating fluid FR then joins the second bypass device 18 bypassing the second expansion member 16 and the heat exchanger 11, to then reach the second circulation orifice 23, take the fourth channel 27 to reach the outlet 21. Finally, the refrigerating fluid FR flows through the accumulator 9 and then returns to the compressor 8.

La fig.3 représente le système de climatisation 1 mis en oeuvre selon un premier mode déshumidification. Dans cette configuration, le premier canal 24 et le deuxième canal 25 sont inopérants tandis que le troisième canal 26 et le quatrième canal 27 sont utilisés pour la circulation du fluide réfrigérant FR à l'intérieur de la vanne quatre-voies 19. Le premier dispositif de contournement 17 est ouvert de telle sorte que le fluide réfrigérant FR contourne le premier organe de détente 15 tandis que le deuxième dispositif de contournement 18 est fermé de telle sorte que le fluide réfrigérant FR circule à l'intérieur du deuxième organe de détente 16 et de l'échangeur thermique 11. Le volet de mixage 31 est en position d'ouverture et la pompe 28 est mise en oeuvre de telle sorte que le fluide caloporteur FC circule à l'intérieur de la boucle secondaire 13. Le pulseur 4 est activé pour faire circuler le flux d'air 2 à l'intérieur de ladite installation 3. A l'intérieur de la boucle de climatisation 7, le fluide réfrigérant FR circule depuis le compresseur 8 vers l'entrée 20, puis à travers le troisième canal 26 vers le premier orifice de circulation 22 pour atteindre le premier échangeur de chaleur fluide réfrigérant / fluide caloporteur 12. Ce dernier se comporte comme un refroidisseur de gaz de manière à réchauffer le fluide caloporteur FC. A l'instar de la configuration représentée sur la fig.2, la boucle de climatisation 7 est mise à profit pour réchauffer le flux d'air 2 préalablement à la délivrance de ce dernier à l'intérieur de l'habitacle et la boucle secondaire 13 est mise à contribution de manière à ce que le radiateur 29 réchauffe également le flux d'air 2 en récupérant de la chaleur auprès du premier échangeur de chaleur fluide réfrigérant / fluide caloporteur 12 et de l'échangeur fluide caloporteur / moteur 32. Le fluide réfrigérant FR quitte ensuite le premier échangeur de chaleur fluide réfrigérant / fluide caloporteur 12 pour circuler à travers le premier dispositif de contournement 17 en contournant le premier organe de détente 15. Le fluide réfrigérant FR s'écoule alors vers le deuxième échangeur de chaleur fluide réfrigérant / air ambiant 14 qui se comporte comme un refroidisseur de gaz en réchauffant l'air ambiant A. Le fluide réfrigérant FR rejoint alors le deuxième organe de détente 16 où il subit une détente et l'échangeur thermique 11 qui se comporte comme un évaporateur. Ces dispositions visent à refroidir et déshumidifier le flux d'air 2 par l'intermédiaire de l'échangeur thermique 11 préalablement au réchauffement du flux d'air 2 par le radiateur 29. Puis le fluide réfrigérant FR rejoint le deuxième orifice de circulation 23, emprunte le quatrième canal 27 pour atteindre la sortie 21. Finalement, le fluide réfrigérant FR s'écoule à travers l'accumulateur 9 pour retourner ensuite au compresseur 8.The fig.3 represents the air conditioning system 1 implemented in a first dehumidification mode. In this configuration, the first channel 24 and the second channel 25 are inoperative while the third channel 26 and the fourth channel 27 are used for the circulation of the refrigerant FR inside the four-way valve 19. The first device bypass 17 is opened so that the refrigerant FR bypasses the first expansion member 15 while the second bypass device 18 is closed so that the refrigerant fluid FR flows inside the second expansion member 16 and of the heat exchanger 11. The mixing flap 31 is in the open position and the pump 28 is implemented so that the coolant FC circulates inside the secondary loop 13. The blower 4 is activated to circulate the flow of air 2 inside said installation 3. Inside the air conditioning loop 7, the refrigerant fluid FR flows from the compressor 8 to the 20, then through the third channel 26 to the first circulation port 22 to reach the first heat exchanger fluid coolant / heat transfer fluid 12. The latter behaves like a gas cooler so as to heat the coolant FC . Like the configuration represented on the fig.2 , the air conditioning loop 7 is used to heat the air flow 2 prior to the delivery of the latter inside the passenger compartment and the secondary loop 13 is put to the contribution so that the radiator 29 also heats the air flow 2 by recovering heat from the first heat exchanger fluid coolant / heat transfer fluid 12 and the coolant heat exchanger / motor 32. The refrigerant fluid FR then leaves the first heat exchanger fluid coolant / heat transfer fluid 12 to circulate through the first bypass device 17 bypassing the first expansion member 15. The refrigerant fluid FR then flows to the second refrigerant fluid heat exchanger / ambient air 14 which behaves as a gas cooler warming ambient air A. the refrigerant then joined EN the second expansion device 16 where it undergoes an expansion and Heat Exchanger 11 which acts as an evaporator. These provisions are intended to cool and dehumidify the air flow 2 through the heat exchanger 11 prior to heating the air flow 2 by the radiator 29. Then the refrigerant FR reaches the second circulation orifice 23, takes the fourth channel 27 to reach the outlet 21. Finally, the refrigerant fluid FR flows through the accumulator 9 to return to the compressor 8.

La fig.4 représente le système 1 mis en oeuvre en un deuxième mode déshumidification. Dans cette configuration, le premier canal 24 et le deuxième canal 25 sont inopérants tandis que le troisième canal 26 et le quatrième canal 27 sont utilisés pour la circulation du fluide réfrigérant FR à l'intérieur de la vanne quatre-voies 19. Le premier dispositif de contournement 17 est fermé de telle sorte que le fluide réfrigérant FR circule à l'intérieur du premier organe de détente 15 et le deuxième dispositif de contournement 18 est également fermé de telle sorte que le fluide réfrigérant FR circule à l'intérieur du deuxième organe de détente 16 et de l'échangeur thermique 11. Le volet de mixage 31 est en position d'ouverture et la pompe 28 est mise en oeuvre de telle sorte que le fluide caloporteur FC circule à l'intérieur de la boucle secondaire 13. Le pulseur 4 est activé pour faire circuler le flux d'air 2 à l'intérieur de ladite installation 3. A l'intérieur de la boucle de climatisation 7, le fluide réfrigérant FR circule depuis le compresseur 8 vers l'entrée 20, puis à travers le troisième canal 26 vers le premier orifice de circulation 22 pour atteindre le premier échangeur de chaleur fluide réfrigérant / fluide caloporteur 12. Ce dernier se comporte comme un refroidisseur de gaz de manière à réchauffer le fluide caloporteur FC. A l'instar des configurations représentées sur les fig.2 et fig.3, la boucle de climatisation 7 est mise à profit pour réchauffer le flux d'air 2 préalablement à sa délivrance à l'intérieur de l'habitacle et la boucle secondaire 13 est mise à contribution de manière à ce que le radiateur 29 réchauffe également le flux d'air 2 en récupérant de la chaleur auprès de l'échangeur fluide caloporteur / moteur 32 et du premier échangeur de chaleur fluide réfrigérant / fluide caloporteur 12. Le fluide réfrigérant FR quitte ensuite le premier échangeur de chaleur fluide réfrigérant / fluide caloporteur 12 pour circuler à travers le premier organe de détente 15 où il subit une première détente. Le fluide réfrigérant FR s'écoule alors vers le deuxième échangeur de chaleur fluide réfrigérant / air ambiant 14 qui se comporte comme un évaporateur en refroidissant l'air ambiant A. Le fluide réfrigérant FR rejoint alors le deuxième organe de détente 16 où il subit une deuxième détente, puis rejoint l'échangeur thermique 11 qui se comporte comme un évaporateur. Il est ainsi possible de réguler l'une par rapport à l'autre la première détente et la deuxième détente. Ces dispositions visent à refroidir et déshumidifier le flux d'air 2 par l'intermédiaire de l'échangeur thermique 11 préalablement au réchauffement du flux d'air 2 par le radiateur 29. Puis, le fluide réfrigérant FR rejoint le deuxième orifice de circulation 23, emprunte le quatrième canal 27 pour atteindre la sortie 21. Finalement, le fluide réfrigérant FR s'écoule à travers l'accumulateur 9 pour retourner ensuite au compresseur 8.The fig.4 represents the system 1 implemented in a second dehumidification mode. In this configuration, the first channel 24 and the second channel 25 are inoperative while the third channel 26 and the fourth channel 27 are used for the circulation of the refrigerant FR inside the four-way valve 19. The first device bypass 17 is closed so that the coolant FR circulates inside the first expansion member 15 and the second bypass device 18 is also closed so that the refrigerant fluid FR flows inside the second organ 16 and the heat exchanger 11. The mixing flap 31 is in the open position and the pump 28 is implemented so that the heat transfer fluid FC circulates inside the secondary loop 13. Pulser 4 is activated to circulate the flow of air 2 inside said installation 3. Inside the air conditioning loop 7, the refrigerant fluid FR flows from the compressor 8 to the inlet 20, then through the third channel 26 to the first circulation port 22 to reach the first heat exchanger fluid coolant / heat transfer fluid 12. The latter behaves like a gas cooler so as to heat the coolant FC . Like the configurations represented on the fig.2 and fig.3 , the air conditioning loop 7 is used to heat the air flow 2 prior to its delivery to the interior of the passenger compartment and the secondary loop 13 is brought into play so that the radiator 29 also warms the air air stream 2 by recovering heat from the coolant / motor heat exchanger 32 and the first refrigerant / heat transfer fluid heat exchanger 12. The refrigerant fluid FR then leaves the first refrigerant / heat transfer fluid heat exchanger 12 to circulate through the first expansion member 15 where it undergoes a first expansion. The refrigerant fluid FR then flows to the second refrigerant / ambient air heat exchanger 14 which behaves as an evaporator cooling the ambient air A. The refrigerant fluid FR then joins the second expansion member 16 where it undergoes a second expansion, then joins the heat exchanger 11 which behaves as an evaporator. It is thus possible to regulate with respect to each other the first detent and the second detent. These provisions are intended to cool and dehumidify the air flow 2 through the heat exchanger 11 prior to the heating of the air flow 2 by the radiator 29. Then, the refrigerant FR reaches the second circulation orifice 23 , takes the fourth channel 27 to reach the outlet 21. Finally, the refrigerant FR flows through the accumulator 9 to return to the compressor 8.

La fig.5 représente le système de climatisation 1 mis en oeuvre en un mode climatisation. Dans cette configuration, le premier canal 24 et le deuxième canal 25 sont inopérants tandis que le troisième canal 26 et le quatrième canal 27 sont utilisés pour la circulation du fluide réfrigérant FR à l'intérieur de la vanne quatre-voies 19. Le premier dispositif de contournement 17 est ouvert de telle sorte que le fluide réfrigérant FR contourne le premier organe de détente 15 et le deuxième dispositif de contournement est fermé de telle sorte que le fluide réfrigérant FR circule à l'intérieur du deuxième organe de détente 16 et de l'échangeur thermique 11. Le volet de mixage 31 est en position de fermeture et la pompe 28 est inopérante de telle sorte que le fluide caloporteur FC ne circule pas à l'intérieur de la boucle secondaire 13. Le pulseur 4 est activé pour faire circuler le flux d'air 2 à l'intérieur de ladite installation 3. A l'intérieur de la boucle de climatisation 7, le fluide réfrigérant FR circule depuis le compresseur 8 vers l'entrée 20, puis à travers le troisième canal 26 vers le premier orifice de circulation 22 pour atteindre le premier échangeur de chaleur fluide réfrigérant / fluide caloporteur 12. Ce dernier est quasiment inopérant en raison de la mise à l'arrêt de la pompe 28. Le fluide réfrigérant FR quitte ensuite le premier échangeur de chaleur fluide réfrigérant / fluide caloporteur 12 pour circuler à travers le premier dispositif de contournement 17 en contournant le premier organe de détente 15. Le fluide réfrigérant FR s'écoule alors vers le deuxième échangeur de chaleur fluide réfrigérant / air ambiant 14 qui se comporte comme un refroidisseur de gaz en réchauffant l'air ambiant A. Le fluide réfrigérant FR rejoint alors le deuxième organe de détente 16 où il subit une détente et l'échangeur thermique 11 qui se comporte comme un évaporateur. Ces dispositions visent à refroidir le flux d'air 2 par l'intermédiaire de l'échangeur thermique 11. Puis, le fluide réfrigérant FR rejoint le deuxième orifice de circulation 23, emprunte le quatrième canal 27 pour atteindre la sortie 21. Finalement, le fluide réfrigérant FR s'écoule à travers l'accumulateur 9 pour retourner ensuite au compresseur 8.The fig.5 represents the air conditioning system 1 implemented in an air conditioning mode. In this configuration, the first channel 24 and the second channel 25 are inoperative while the third channel 26 and the fourth channel 27 are used for the circulation of the refrigerant fluid FR inside the four-way valve. 19. The first bypass device 17 is open so that the refrigerant FR bypasses the first expansion member 15 and the second bypass device is closed so that the refrigerant fluid FR flows inside the second body 16 and the heat exchanger 11. The mixing flap 31 is in the closed position and the pump 28 is inoperative so that the heat transfer fluid FC does not circulate inside the secondary loop 13. The blower 4 is activated to circulate the flow of air 2 inside said installation 3. Inside the air conditioning loop 7, the refrigerant fluid FR flows from the compressor 8 to the inlet 20, then through the third channel 26 to the first circulation port 22 to reach the first heat exchanger fluid coolant / heat transfer fluid 12. The latter is virtually inoperative due to the shutdown of the pump 28. The refrigerant FR then leaves the first heat exchanger fluid coolant / heat transfer fluid 12 to flow through the first bypass device 17 bypassing the first expansion member 15. The refrigerant fluid FR then flows to the second refrigerant / ambient air heat exchanger 14 which behaves like a gas cooler by heating the ambient air A. The refrigerant fluid FR then joins the second expansion member 16 where it undergoes expansion and the heat exchanger 11 which behaves as an evaporator. These provisions are intended to cool the air flow 2 through the heat exchanger 11. Then, the refrigerant FR reaches the second circulation orifice 23, borrows the fourth channel 27 to reach the outlet 21. Finally, the FR refrigerant flows through the accumulator 9 to return to the compressor 8.

L'ensemble de ces dispositions est tel que le système de climatisation 1 de la présente invention est apte à fonctionner en mode chauffage, en mode déshumidification et en mode climatisation de la manière la plus satisfaisante possible, notamment en discernant le premier mode chauffage et le deuxième mode chauffage selon la nature de la température Ta de l'air ambiant A par rapport à la première température seuil Ts1. All these arrangements are such that the air conditioning system 1 of the present invention is able to operate in heating mode, dehumidification mode and air conditioning mode in the most satisfactory manner possible, in particular by discerning the first heating mode and the second heating mode according to the nature of the temperature Ta of the ambient air A with respect to the first threshold temperature Ts1.

L'ensemble de ces dispositions est également tel qu'il possible, après une mise en oeuvre du système de climatisation 1 en mode climatisation, d'interdire une mise en oeuvre du système de climatisation en premier mode de chauffage « sur l'air » pour privilégier le deuxième mode de chauffage « sur l'eau ». Ces dispositions visent à empêcher pendant le laps de temps T, par exemple compris entre 15 min et 45 min, préférentiellement de l'ordre de 30 min, d'empêcher la formation de buée sur le pare-brise et/ou les vitres avant du véhicule.All these provisions is also as possible, after an implementation of the air conditioning system 1 in air conditioning mode, to prohibit an implementation of the air conditioning system in the first mode of heating "on air" to favor the second mode of heating "on the water". These provisions are intended to prevent for the lapse of time T , for example between 15 min and 45 min, preferably of the order of 30 min, to prevent fogging on the windshield and / or the front windows of the vehicle. vehicle.

Claims (13)

  1. Air conditioning system (1) for a motor vehicle comprising a heating, ventilation and/or air conditioning installation (3) routing the circulation of an air flow (2), an air conditioning circuit (7) inside which a refrigerant (FR) circulates and a secondary circuit (13) inside which a coolant (FC) circulates, the secondary circuit (13) and the air conditioning circuit (7) jointly comprising a first refrigerant/coolant heat exchanger (12), the secondary circuit (13) comprising a radiator (29) placed inside said installation (3), the air conditioning circuit (7) comprising at least one expansion member (15, 16), a compressor (8), a four-way valve (19), a second refrigerant/ambient air heat exchanger (14) and a heat exchanger (11) placed inside said installation (3),
    the four-way valve (19) comprising a first duct (24) for circulating the refrigerant (FR) from the first refrigerant/coolant heat exchanger (12) to the compressor (8), a second duct (25) for circulating the refrigerant (FR) from the compressor (8) to the heat exchanger (11) in a first mode of heating the air flow (2),
    a third duct (26) for circulating the refrigerant (FR) from the compressor (8) to the first refrigerant/coolant heat exchanger (12), and a fourth duct (27) for circulating the refrigerant (FR) from the second refrigerant/ambient air heat exchanger (14) to the compressor (8), in a second mode of heating the air flow (2), a first expansion member (15) being interposed between the first refrigerant/coolant heat exchanger (12) and the second refrigerant/ambient air heat exchanger (14),
    a second expansion member (16) being interposed between the second refrigerant/ambient air heat exchanger (14) and the heat exchanger (11), characterized by a first bypass device (17) associated with the said first expansion member (15) and a second expansion device (18) arranged in parallel with the second expansion device (16) and the heat exchanger (11).
  2. Air conditioning system (1) according to Claim 1, in which the first refrigerant/coolant heat exchanger (12), the first expansion member (15) and the second refrigerant/ambient air heat exchanger (14) are directly in series in the air conditioning circuit (7).
  3. Air conditioning system (1) according to either one of the preceding claims, characterized in that the compressor (8) is positioned in the air conditioning circuit (7) between an outlet (21) for refrigerant (FR) at the four-way valve (19) comprises and an inlet (20) for refrigerant (FR) that the four-way valve (19) also comprises.
  4. Air conditioning system (1) according to any one of the preceding claims, characterized in that the secondary circuit (13) comprises a pump (28) and a coolant/electrical auxiliary heat exchanger (32).
  5. Air conditioning system (1) according to Claim 4, characterized in that the electrical auxiliary is an electric motor and/or a power electronics unit (33) and/or a battery.
  6. Air conditioning system (1) according to Claims 1, 2 and 4, characterized in that the said system (1) comprises control means (35) controlling use of the first duct (24), of the second duct (25), of the third duct (26), of the fourth duct (27), of the first bypass device (17), of the second bypass device (18), of the pump (28) and of a mixing flap (31) .
  7. Air conditioning system (1) according to Claim 6, characterized in that use of the control means (35) is placed under dependency of information pertaining to a difference D between a measurement of a temperature Ta of the ambient air A and a first threshold temperature Ts1.
  8. Method for operating an air conditioning system (1) according to Claim 7, characterized in that the method comprises:
    - a first mode of heating the air flow (2) which is performed by the heat exchanger (11) of the air conditioning circuit when the difference D is negative or zero,
    - a second mode of heating the air flow (2) which is performed by the radiator (29) of the secondary circuit when the difference D is positive,
    the first heating mode consisting in opening the first duct (24) and the second duct (25), closing the third duct (26) and the fourth duct (27), opening the first bypass device (17), closing the second bypass device (18) and switching off the pump (28).
  9. Method according to Claim 8, characterized in that the second heating mode consists in closing the first duct (24) and the second duct (25), opening the third duct (26) and the fourth duct (27), closing the first bypass device (17), opening the second bypass device (18) and switching on the pump (28).
  10. Method according to Claim 8, characterized in that the method comprises a first dehumidifying mode which consists in closing the first duct (24) and the second duct (25), opening the third duct (26) and the fourth duct (27), opening the first bypass device (17), closing the second bypass device (18) and switching on the pump (28).
  11. Method according to Claim 8, characterized in that the method comprises a second dehumidifying mode which consists in closing the first duct (24) and the second duct (25), opening the third duct (26) and the fourth duct (27), closing the first bypass device (17), closing the second bypass device (18) and switching on the pump (28).
  12. Method according to Claim 8, characterized in that the method comprises an air conditioning mode which consists in closing the first duct (27) and the second duct (25), opening the third duct (26) and the fourth duct (27), opening the first bypass device (17), closing the second bypass device (18), placing the mixing flap (31) in the closed position and switching off the pump (28).
  13. Method according to the preceding claim, characterized in that after the air conditioning system (1) has been operated in air conditioning mode, the method comprises a period of time T during which operation of the air conditioning system (1) in the first heating mode is forbidden and during which operation of the air conditioning system (1) in the second heating mode is permitted.
EP10770742.4A 2009-09-30 2010-09-29 Air conditioning system for automotive vehicles and method of operating such an air conditiong system in various modes Active EP2483091B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0904654A FR2950571B1 (en) 2009-09-30 2009-09-30 AIR CONDITIONING SYSTEM EQUIPPED WITH A MOTOR VEHICLE AND METHOD FOR IMPLEMENTING SUCH A SYSTEM ACCORDING TO VARIOUS OPERATING MODES
PCT/EP2010/064491 WO2011039275A1 (en) 2009-09-30 2010-09-29 Air‑conditioning system fitted to a motor vehicle and method of operating such a system according to various modes of operation

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EP2483091A1 EP2483091A1 (en) 2012-08-08
EP2483091B1 true EP2483091B1 (en) 2016-03-30

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JP (1) JP5552166B2 (en)
CN (1) CN102648101B (en)
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WO (1) WO2011039275A1 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2991241B1 (en) * 2012-05-31 2014-06-13 Valeo Systemes Thermiques HEATING, VENTILATION AND / OR AIR CONDITIONING INSTALLATION FOR MOTOR VEHICLE AND METHOD OF IMPLEMENTING SUCH INSTALLATION.
FR2991240B1 (en) * 2012-05-31 2014-06-13 Valeo Systemes Thermiques HEATING, VENTILATION AND / OR AIR CONDITIONING INSTALLATION FOR MOTOR VEHICLE AND METHOD OF IMPLEMENTING SUCH INSTALLATION.
JP6201621B2 (en) * 2013-10-21 2017-09-27 株式会社デンソー Air conditioning unit for vehicles
DE102013112825A1 (en) * 2013-11-20 2015-05-21 Valeo Klimasysteme Gmbh Front module of a vehicle
US11459110B2 (en) * 2016-04-22 2022-10-04 Hamilton Sunstrand Corporation Environmental control system utilizing two pass secondary heat exchanger and cabin pressure assist
FR3064944B1 (en) * 2017-04-05 2019-04-05 Valeo Systemes Thermiques INDIRECT INDIRECT AIR CONDITIONING CIRCUIT FOR A MOTOR VEHICLE AND METHOD OF OPERATING THE SAME
FR3066584B1 (en) * 2017-05-19 2019-05-03 Valeo Systemes Thermiques INDIRECT INDIRECT AIR CONDITIONING CIRCUIT FOR A MOTOR VEHICLE AND METHOD FOR MANAGING HEAT PUMP MODE
DE102019219539A1 (en) * 2019-12-13 2021-06-17 Mahle International Gmbh Ventilation device
DE102019219536A1 (en) * 2019-12-13 2021-06-17 Mahle International Gmbh Ventilation device
CN115195403A (en) * 2022-08-09 2022-10-18 浙江极氪智能科技有限公司 Air conditioning system and automobile
CN115837827B (en) * 2022-12-15 2024-10-01 中国第一汽车股份有限公司 Secondary heating's heat pump air conditioning system and electric automobile

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0478613A (en) * 1990-04-11 1992-03-12 Nippondenso Co Ltd Heat pump type air conditioner
JP2555197Y2 (en) * 1991-10-04 1997-11-19 カルソニック株式会社 Automotive air conditioners
JPH07125530A (en) * 1993-11-04 1995-05-16 Calsonic Corp Air conditioner for automobile
DE10006513B4 (en) * 2000-02-15 2014-12-24 Behr Gmbh & Co. Kg Air conditioning system for a motor vehicle with heat pump and / or reheat mode
JP4380077B2 (en) 2000-09-27 2009-12-09 株式会社デンソー Air conditioner for vehicles
NO320664B1 (en) * 2001-12-19 2006-01-16 Sinvent As System for heating and cooling vehicles
US7287581B2 (en) * 2003-12-18 2007-10-30 General Motors Corporation Full function vehicle HVAC/PTC thermal system
JP2005263200A (en) * 2004-02-18 2005-09-29 Denso Corp Air conditioner for vehicle
JP4654655B2 (en) * 2004-10-19 2011-03-23 株式会社デンソー Vapor compression refrigerator
DE502007004125D1 (en) * 2007-02-23 2010-07-29 Behr America Inc Air conditioning for one vehicle
CN101279580A (en) * 2008-05-30 2008-10-08 清华大学 Residual heat pump air conditioner system for fuel-cell vehicle

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WO2011039275A1 (en) 2011-04-07
JP2013506590A (en) 2013-02-28
CN102648101B (en) 2015-02-04
CN102648101A (en) 2012-08-22
FR2950571B1 (en) 2020-04-17
EP2483091A1 (en) 2012-08-08
JP5552166B2 (en) 2014-07-16
FR2950571A1 (en) 2011-04-01

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